not applying to invoice , i'm talking about printed invoice to client. the clients need to see if there are a credit left or solde left after the payment applied to invoice.
the remaining amount to pay is shown in the invoice as balance (positive), and normally he should be negative because we own money to client . if client owe money to us then the balance should be shown with positive value . this is what we do in our accounting system in our country, not sure if this is the same as USA .